Clockless DAC parallel single supply votage output needed

I am looking for a DAC that does not require a clock to update its output.  Parallel input (8 bits is sufficient), single supply (3.3 or 5 V), voltage output (rail to rail preferred), any speed, internal reference.  I would like its output voltage to continuously track and change whenever any of its inputs changes.  I have seen this referred to as a transparent DAC.


The AD7801 seems to come close.  It could be operated in Automatic Update Mode by tying LDAC to GND but then WR still needs to be clocked.